AD8023ARZ

Overview

The AD8023ARZ is a high current output, triple video amplifier manufactured by Analog Devices Inc. It operates on supply voltages ranging from ±2.5 V to ±7.5 V with a maximum power supply current of 10.0 mA per amplifier. The device features a unity gain bandwidth of 250 MHz and a slew rate of 1200 V/µs. It provides excellent video specifications including 0.1 dB gain flatness to 10 MHz, 0.06% differential gain error, and 0.02° differential phase error. Each amplifier delivers 70 mA output current and can drive unlimited capacitive loads, settling to 0.1% in 35 ns while driving 300 pF capacitance.

Feature Summary

• High current output drive capability optimized for driving large capacitive loads without oscillation.
• Integrated high-speed disable function allows powering down amplifiers or high-impedancing outputs for multiplexing applications.
• Current feedback architecture ensures wide bandwidth and low differential gain and phase errors suitable for video signals.
• Outputs swing to within one volt of either supply rail to accommodate standard video signal levels.

Applications

• LCD Displays
• Video Line Driver
• Broadcast and Professional Video
• Computer Video Plug-In Boards
• RGB Amplifier in Component Systems

Procurement Notes

Verify the specific ordering suffix matches the required package and reel configuration. The AD8023ARZ denotes the industrial temperature range (-40°C to +85°C) in a 14-Lead Plastic SOIC package. Confirm that the 'R' suffix indicates the standard tape and reel option if bulk handling is required, distinct from the 'REEL' or 'REEL7' variants which specify different reel quantities. Ensure compatibility with the intended supply voltage range of ±2.5 V to ±7.5 V.

Selection Notes

Select this component when designing circuits requiring simultaneous processing of three independent video channels with high drive strength. It is appropriate for applications demanding minimal signal distortion, evidenced by low differential gain and phase errors. Consider its current feedback topology for bandwidth customization via feedback resistor selection. Ensure the design accounts for the need for level shifting if controlling disable pins with standard logic on dual supplies.

Part Context

The AD8023 is part of Analog Devices' portfolio of high-speed video amplifiers designed for professional and consumer video equipment. It serves as a triple-channel solution, consolidating three individual amplifiers into a single package to reduce board space. The device addresses the challenge of driving heavy capacitive loads common in video distribution networks while maintaining signal integrity across wide bandwidths.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

FAQ

How does the AD8023 handle large capacitive loads?

The AD8023 is optimized to drive unlimited capacitive loads. It achieves stability with large capacitance, such as 300 pF, by utilizing a small series output resistor combined with an appropriate feedback resistor, allowing it to settle rapidly without oscillation.

What is the function of the Disable pins?

Each amplifier has a dedicated Disable pin. Pulling the voltage on these pins approximately 1.6 V above the negative supply powers down the corresponding amplifier, reducing quiescent current and placing the output in a high-impedance state. Leaving the pin floating keeps the amplifier enabled.

What is the typical differential gain and phase error?

When driving a 150 Ω load, the AD8023 exhibits a differential gain error of 0.06% and a differential phase error of 0.02 degrees at 3.58 MHz with a gain of +2.